The Combination Drill & Counterbore Tool integrates precision drilling and flat-bottom counterboring into a single machining step, ensuring tight tolerances, stable chip evacuation, and consistent counterbore geometry. Engineered for applications requiring accurate pilot holes with controlled counterbore diameters, this tool enhances productivity by eliminating multiple tool changes and improving overall cycle efficiency across steel, aluminum, stainless steel, and non-ferrous materials.
The Combination Drill & Counterbore Tool is designed to machine pilot holes and flat-bottom counterbores in a single operation, ensuring accurate alignment between the drilled and counterbored sections. By integrating a precision-ground drill point with a cylindrical counterbore profile, this tool improves positional accuracy, enhances productivity, and eliminates the need for multiple tool changes. Its optimized flute design ensures stable chip evacuation and consistent surface finish across a wide range of materials, including steels, stainless steels, aluminum alloys, and non-ferrous metals.
Engineered for applications requiring socket head cap screw seats, precision counterbores, recess pockets, and stepped holes, this combination design delivers high repeatability, reduced cycle time, and superior dimensional control—ideal for high-volume machining environments.
Stepped holes requiring accurate pilot + counterbore alignment
Socket head cap screw counterbores
Recessed flat-bottom pockets for mechanical fasteners
Precision counterbores in tooling plates and fixture components
Counterbore machining in steel, stainless steel, aluminum, and non-ferrous materials
Production environments requiring one-pass drilling and counterboring
Replacement of multiple tools (drill + end mill/spotface cutter) with a single integrated tool
Integrated drill and counterbore geometry for one-pass machining
Precision pilot drill section ensuring accurate hole guidance
Flat-bottom or stepped counterbore design per custom drawings
Optimized flute geometry for smooth chip evacuation
High rigidity design minimizing runout and improving dimensional accuracy
Available in solid carbide, brazed PCD, and coated carbide materials
Customizable shank diameter, point angle, flute length, and overall length
Suitable for CNC machining centers, drilling units, and automated production lines
Eliminates multiple tool changes, reducing cycle time
Ensures perfect concentricity between drilled holes and counterbores
Achieves superior dimensional consistency in mass production
Reduces tool inventory and simplifies process planning
Enhances hole quality and surface finish
Provides long tool life even under high-duty machining conditions
Improves fixture and component assembly accuracy due to consistent counterbore geometry
| Parameter | Specification |
|---|---|
| Tool Type | Combination Drill & Counterbore Tool |
| Cutting Material | Solid Carbide, Coated Solid Carbide, Brazed Carbide, Brazed PCD, Brazed CBN, Solid HSS, Brazed HSS |
| Pilot Drill Diameter | Custom |
| Counterbore Diameter | Custom (flat-bottom or stepped) |
| Drill Point Angle | 118°, 120°, 130°, or custom |
| Included Diameter Accuracy | ±0.02 mm or per customer requirement |
| Counterbore Depth | Custom |
| Flute Length | Custom |
| Shank Diameter | Custom (straight shank or reduced shank) |
| Overall Length (OAL) | Custom |
| Coating Options | TiAlN, AlTiN, DLC, Diamond, or uncoated |
| Machining Materials | Steel, stainless steel, aluminum, non-ferrous alloys, composites |
| Customization | Fully designed per customer drawing and specifications |
For custom Combination Drill & Counterbore Tool designs or engineering support, please contact:
[email protected]
Aoshiji® Custom Tool – Precision Cutting Solutions for Global Manufacturing
